61681214467 has 4 divisors (see below), whose sum is σ = 62726658840. Its totient is φ = 60635770096.

The previous prime is 61681214453. The next prime is 61681214489. The reversal of 61681214467 is 76441218616.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61681214467 - 2²³ = 61672825859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61681214407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 522722098 + ... + 522722215.

It is an arithmetic number, because the mean of its divisors is an integer number (15681664710).

Almost surely, 2^61681214467 is an apocalyptic number.

61681214467 is a deficient number, since it is larger than the sum of its proper divisors (1045444373).

61681214467 is a wasteful number, since it uses less digits than its factorization.

61681214467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1045444372.

The product of its digits is 387072, while the sum is 46.

The spelling of 61681214467 in words is "sixty-one billion, six hundred eighty-one million, two hundred fourteen thousand, four hundred sixty-seven".